atomic_ops.h: missing ...

Hello.

While fiddling around with software that is looking for an include file
"atomic_ops.h", which seems to reside in the FreeBSD operating system's
sources with lib/lbkse, I'd like to know whether those architecture
specific header files are installed in some places, where they could be
found by the regular ports building environment (without necessarily
having the OS sources installed).

I'm working on FreeBSD 10.0-CUR with OS sources installed.

Doing a "locate atomic_ops.h" reveals

/usr/local/include/cpl_atomic_ops.h
/usr/src/lib/libkse/arch/amd64/include/atomic_ops.h
/usr/src/lib/libkse/arch/arm/include/atomic_ops.h
/usr/src/lib/libkse/arch/i386/include/atomic_ops.h
/usr/src/lib/libkse/arch/ia64/include/atomic_ops.h
/usr/src/lib/libkse/arch/powerpc/include/atomic_ops.h
/usr/src/lib/libkse/arch/sparc64/include/atomic_ops.h

Is this include missed by intention or is it a bug?

Thanks in advance.

Oliver